Pressing mechanism



Jan. 26 1926.

W. H COTTON PRESSING MECHANISM Filed March 8. 1924 5 Shoots-Sheet. 1

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Jan. 26, 1926. 1,570,618

W. H. COTTON PRESSING MECHANISM Filed March 8, 1924 3 Sheets-Sheet 2 I gr i w J 2 a a 4 w m I I n 2. n w a 1/; a n w m m L r r J4 T I 3 f 2 z a v I, M fir a u Jan. 6 1926.

W. H. .COTTON PRESSING uscmursm Filed March 8, 1924 a Sheets-Sheet 5 5 26/ %?727/872f07" Lg Z M its I Patented Jan. 26, 1926.

UNITED STATES WALrnRH. common, or CHICAGO, ILLINOIS.

PRESSING MECHANISM.

Application filed March a, 1924. Serial No. 697,'924.

To all whom it may concern:

Be it known that I, WALTER H. COTTON,

- citizen of-the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Pressing Mechanism, of which the following is a specification The invention relates to presses for pressing material'i'nto form, and particularly to presses for forming complex shapes suclr as could not be made in the; ordinary molds of power 'operated machines. r

The object of theinvention is primarily to provide means for pressing brick other than the oblong or plain surfaced shapes by having the moving pressing head's engage the opposite sides of the shortest dimension of the brick or in other words the sides of 'reatest area, and to'provide special means for ejecting the brick which could not'be removed intact with the present means of ejection.

A further object of the invention is to provide mechanical means for preventing the brick from bei carried through suction or adhesion to the upper p'ressing head afterthe pressure has been relieved.

, Theseobjects, andother objects brought forth in the accompanying"specification, are attained mechanism illustrated in the accompanying drawings, in which 1 F 1g. 1 is a front elevation with certain parts shown in section and showing such parts of the press as-are directly related to the present invention;

Figs. 2, 3 and 1 are elevations partly in section similar to that shown in Fig. 1, except that each fi ure shows a distinctiveposition in the cycle of operation of the press;

5 is a side elevation showing certain parts. in section; V v

Fig. 6 is a front elevation partly in sec tion showing-such modifications as are necessary for pressing abricksuchas shown'in Fig. 8;

Fig. the pressing table; I 1

Fig. 8 is a perspective view. of one ofthe mobile mold liners; V

Figs. 9' and- 10 are perspective illustra tions of brick such as maybe formed by this device; and

Fig-(-11 shows a modification of the inven-- tion'. i I

Inthe drawing numerals 10 and 11 desigte the s de fr mes of a press. secured in 7 is-a plan section at the plane of' proper relation b spacing members, one of which is shown at 12. I

A pressing mechanism comprising side bars 13'13 rigidly secured together by a crosshead 14 is suitably guided in the frames and carries a toggle, part of which is shown in dotted lines at l5i'lwhere it is pivoted to a crosshead 16 whic is relatively movable with relation to thecrosshead 14, its move-v ment being governed by the motion of the toggle which has its upper leg (not shown) pivoted to a shaft secured to the side bars 13. The upper andlower pressing heads 17 and 18 are secured to "the crosshead '16- and a saddle 19 respectively, the latter being. mechanically connected to the lower crosshead 14, and slidable vertically with relation'thereto; Springs as 20 serve to urge the saddle upwardly. 'Mechanism as shown in Figs. 1 and 5 connecting the saddle 19 to a hand wheel 21 serves to govern the fall of the lowerressing head 18 during the operation'o charging, and therefore governs the quantity of material tobe pressed at each pressing operation. A reciprocating charger is'shown 'at'22, a feed hopper at 23 anddelivery spout at '24 allserve as mechanism for" charging the mold with material. An: 85

apron 25 serves to receive the completed green brick.

The above mechanism"is all of common construction, well known in' the art, and forms a part ofthisinvention only inasmuch as. it shows elements required to complete combinations.

A mold box comprises a pair of beams 26,

mortised in the frames as at 27, and secured thereto by cap screws as 28. These beams arechanneled as at 29and serve to secure the mold in proper position in'the press. Thefnulneral 30 designates the side liners, 31 transverse 'abutments :which serve as mold spacers, and end blocks 32, all of which are milledtomplementarv to the beam channel and secured thereto longitudinally by means.

of pressure on the end block through set screws 33 and by clampingthe beams-by- The'pressing heads 17am 18 arelpro-i means of bolt 34.

vided with dieplates35jand 36 rigidly secured thereto. The latter engaging a groove- 37 in the end liners 38 and 39 withthe result that the end liners 38 and 39 move vertically' and in unison-with the lower pressing head. The end liners may be provided with a tongue'or groove as shown at 4.0 which results in a complementary contour in the brick when pressed.

The end liners lie against the transverse abutments 31, proper provision being made for lubrication of the contacting surfaces. If desired these mobile end linersv may be slightly tapered on the ends towards the back as indicated by dotted lines in Fig. '8, to prevent the liners from becoming claybound at the ends.

The operation of the device is as follows The normal position of the front end of the charger 2:2 after functioning is indicated by the dotted line 41, Fig. 5.

In the illustration, Fig. 1, the charger has completed its function and the upper pressing heads are lowering into the mold. The space between the saddle 19 and crosshead shows that the mold has not been adjusted by. the hand wheel 21 to maximum capacity. Upon further movement of the upper. pressing head, as shown in Fig. 2, the head 17 has entered the mold, the material is under compression and the lower pressing head 18 has receded, closing the gap between the saddle 1'9 and: crosshead l t. The upper pressing head 17 continues to lower into the mold until the crosshead 16 contacts with the stop blocks 42 (see Fig. 8) after which the lower head 18 rises, pressing the material from the bottom and completing the brick at which point in the operation the toggles a-re substantially straight. The entire pressing mechanism now rises to the position shown in Fig. 4 and the toggles have flexed, relieving the pressure on the brick which has freedi itself from the adhesion of the upper dieplate by still clinging to the end liners. The bottomof the brick is now flush with the top of the side liners. At this point the charger starts forward (see Fig. 5) and pushes the brick toward the receiving apron.

Immediately the brick is free from the endliners the lower pressing head drops, sucking in the material, and completing the cycle of the press.

Fig. 6 shows the invention modified for pressing a brick as shown in Fig. 10. This brick has a groove in one end only, and therefore the' mold requires only one mobile end liner 43, the other end liner 44: being secured rigidly. This brick is provided. with pockets on its upper face and. the irregularities in the upper die necessary to their formation increase the tendency to adhesion.

In Fig. 11 is shown a modified-form of the device for pressingplainbrick. As shown, the linerSBSO and 390 are provided with a transverse groove whichis adapted to be of a width equal to the thickness of the pressed material whereby when the plunger 17 is elevated the pressed materia-l 'A will be prevented from adhering to the die plate 35 during the upwardmovement of the plunger 17 by the shoulders formed by the grooves 400 If desired the die plate 35 may be embossed or provided with a projection for forming a corresponding depression in the pressed material A. 7

Many modifications may be made without departing from the spirit of the invention.

Vi hat I claim as my invention and desire to secure by Letters Patent, is

1. In a machine for pressing material into form, a mold, two pressing heads adapted to press material in the mold, means interlocking the pressed material with one of the pressing heads while the other pressing. head is moved out of engagement with the pressed material, and means for ejecting the pressed material from the mold without previously releasing the interlockingmeans.

2. In a machine for pressing material into form, in combination, a mold, means. for charging the mold, upper and lower means for pressing material in the mold, means interlockingthe pressed material while the upper pressing means moves out of engagement with the pressed material, and means for ejecting the pressed material from the mold without previously releasing the in terlocking means. 1-

3. In a machine for pressing material into form, in combination, a mold comprising liners, upper and lower pressing heads adapted to press material in the mold, and means incorporated in a liner for locking the pressed material against vertical movement relative thereto.

4. In a machine for pressing material into form, in combination, a mold comprising liners adapted to form brick of interlocking contour, means for pressing material in the mold, and means including vertical movable elements and a horizontally movable element. for ejecting the pressed material from the mold.

5. In a machine for pressing material into form, in combination, a mold, means for pressing material in the mold, said mold comprising a liner movable with the pressing means.

6. In a machine for pressing material into form, in combination, a mold comprising stationary side liners and vertically movable end liners having a horizontal tongue or groove on its molding face, an upper and lower head adapted to press material in the mold, and means whereby the end liners will. move in unison with the lower pressing head.

7. Ina machine for pressing material into form, in combination, a mold comprising liners, upper and lower pressing heads adapted to press material in the mold, said.

liners comprising a liner movable with rela tion to the pressing heads and havmgmterlock ng engagement w th the lower pressing head, and a backing plate or abutment engaging the mobile liner on the side remote from its connection With said lower pressing head. i

8. In a machine for p' essing plastic material into solid form, in combination With a mold chamber having a lateral Wall adapted to impart to the form an unevensurface, of a resser head arranged to enter such chamber and means for disengaging the form from the named Wall.

5). In a press for forming bricks having one of their edge faces longitudinally ribbon, in combination, a table having a mold cha nber, a side Wall of such chamber being transversely ribbed, a plunger reciprocable over the table, means for compressing material Within the chamber, and means for raising the brick to the level of the table and with it the ribbed Wall.

10. In a press for forming brick, in combination, a mold chamber, opposite side Walls of which are transversely ribbed, resser. means entering the chamber for compressing the material, means for raising the brick from the chamber and with it the ribbed Walls, and a plunger movable between such Walls, When elevated, to eject the brick.

V ALTER H. COTTON. 

